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GE910
Users Guide
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Telit Communications S p A GE910 Users Guide

GE910 Hardware User Guide
1vv0300962 Rev.4 – 2012-06-25
APPLICABILITY TABLE
APPLICABILITY TABLE
APPLICABILITY TABLEAPPLICABILITY TABLE
PRODUCT
PRODUCT
PRODUCTPRODUCT
GE910
GE910----QUAD
GE910GE910
QUAD
QUADQUAD
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SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
Notice
While reasonable efforts have been made to assure the accuracy of this document, Telit assumes no liability resulting from any inaccuracies or omissions in this document, or from use of the information obtained herein. The information in this document has been carefully checked and is believed to be entirely reliable. However, no responsibility is assumed for inaccuracies or omissions. Telit reserves the right to make changes to any products described herein and reserves the right to revise this document and to make changes from time to time in content hereof with no obligation to notify any person of revisions or changes. Telit does not assume any liability arising out of the application or use of any product, software, or circuit described herein; neither does it convey license under its patent rights or the rights of others.
It is possible that this publication may contain references to, or information about Telit products (machines and programs), programming, or services that are not announced in your country. Such references or information must not be construed to mean that Telit intends to announce such Telit products, programming, or services in your country.
Copyrights
This instruction manual and the Telit products described in this instruction manual may be, include or describe copyrighted Telit material, such as computer programs stored in semiconductor memories or other media. Laws in the Italy and other countries preserve for Telit and its licensors certain exclusive rights for copyrighted material, including the exclusive right to copy, reproduce in any form, distribute and make derivative works of the copyrighted material. Accordingly, any copyrighted material of Telit and its licensors contained herein or in the Telit products described in this instruction manual may not be copied, reproduced, distributed, merged or modified in any manner without the express written permission of Telit. Furthermore, the purchase of Telit products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of Telit, as arises by operation of law in the sale of a product.
Computer Software Copyrights
The Telit and 3rd Party supplied Software (SW) products described in this instruction manual may include copyrighted Telit and other 3rd Party supplied computer programs stored in semiconductor memories or other media. Laws in the Italy and other countries preserve for Telit and other 3rd Party supplied SW certain exclusive rights for copyrighted computer programs, including the exclusive right to copy or reproduce in any form the copyrighted computer program. Accordingly, any copyrighted Telit or other 3rd Party supplied SW computer programs contained in the Telit products described in this instruction manual may not be copied (reverse engineered) or reproduced in any manner without the express written permission of Telit or the 3rd Party SW supplier. Furthermore, the purchase of Telit products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of Telit or other 3rd Party supplied SW, except for the normal non-exclusive, royalty free license to use that arises by operation of law in the sale of a product.
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Usage and Disclosure Restrictions License Agreements
The software described in this document is the property of Telit and its licensors. It is furnished by express license agreement only and may be used only in accordance with the terms of such an agreement.
Copyrighted Materials
Software and documentation are copyrighted materials. Making unauthorized copies is prohibited by law. No part of the software or documentation may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, without prior written permission of Telit
High Risk Materials
Components, units, or third-party products used in the product described herein are NOT fault­tolerant and are NOT designed, manufactured, or intended for use as on-line control equipment in the following hazardous environments requiring fail-safe controls: the operation of Nuclear Facilities, Aircraft Navigation or Aircraft Communication Systems, Air Traffic Control, Life Support, or Weapons Systems (High Risk Activities"). Telit and its supplier(s) specifically disclaim any expressed or implied warranty of fitness for such High Risk Activities.
Trademarks
TELIT and the Stylized T Logo are registered in Trademark Office. All other product or service names are the property of their respective owners.
Copyright © Telit Communications S.p.A.
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Contents
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1. Introduction.....................................................................................................................................................................7
1.1. Scope........................................................................................................................................................................7
1.2. Audience ..................................................................................................................................................................7
1.3. Contact Information, Support...................................................................................................................................7
1.4. Document Organization ...........................................................................................................................................8
1.5. Text Conventions .....................................................................................................................................................9
1.6. Related Documents ..................................................................................................................................................9
2. Overview........................................................................................................................................................................10
3. GE910 module connections ..........................................................................................................................................11
3.1. PIN-OUT................................................................................................................................................................11
3.2. LGA PADs Layout.................................................................................................................................................16
4. Hardware Commands...................................................................................................................................................17
4.1. Turning ON the GE910..........................................................................................................................................17
4.2. Turning OFF the GE910 ........................................................................................................................................21
4.3. HW Unconditional Shutdown on GE910...............................................................................................................23
4.3.1.
Hardware Unconditional shutdown ..............................................................................................................23
5. Power Supply.................................................................................................................................................................26
5.1. Power Supply Requirements ..................................................................................................................................26
5.2. Power Consumption...............................................................................................................................................27
5.3. General Design Rules.............................................................................................................................................28
5.3.1.
Electrical Design Guidelines.........................................................................................................................28
5.3.2.
Thermal Design Guidelines...........................................................................................................................31
5.3.3.
Power Supply PCB layout Guidelines ...........................................................................................................32
6. Antenna..........................................................................................................................................................................33
6.1. GSM Antenna Requirements .................................................................................................................................33
6.2. GSM Antenna - PCB line Guidelines.....................................................................................................................34
6.3. PCB Guidelines in case of FCC certification.........................................................................................................35
6.3.1.
Transmission line design ...............................................................................................................................35
6.3.2.
Transmission line measurements...................................................................................................................36
6.4. GSM Antenna - Installation Guidelines.................................................................................................................38
7. Logic level specifications ..............................................................................................................................................39
7.1. Unconditional Shutdown........................................................................................................................................40
8. Serial Ports ....................................................................................................................................................................41
8.1. MODEM SERIAL PORT ......................................................................................................................................41
8.2. RS232 level translation ..........................................................................................................................................43
9. USB Port........................................................................................................................................................................45
9.1. USB 2.0 FS ............................................................................................................................................................45
10. Audio Section Overview...........................................................................................................................................46
10.1. MIC connection......................................................................................................................................................47
10.2. LINE-IN connection...............................................................................................................................................48
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10.3. EAR connection .....................................................................................................................................................49
10.4. Electrical Characteristics........................................................................................................................................50
10.4.1. Input Lines.....................................................................................................................................................50
10.4.2. Output Lines ..................................................................................................................................................51
11. General Purpose I/O.................................................................................................................................................52
11.1. GPIO Logic levels..................................................................................................................................................53
11.2. Using a GPIO Pad as INPUT .................................................................................................................................54
11.3. Using a GPIO Pad as OUTPUT .............................................................................................................................54
11.4. Indication of network service availability..............................................................................................................55
11.5. RTC Bypass out .....................................................................................................................................................56
11.6. External SIM Holder Implementation....................................................................................................................56
11.7. ADC Converter ......................................................................................................................................................56
11.7.1. Description....................................................................................................................................................56
11.7.2. Using ADC Converter ...................................................................................................................................56
12. Mounting the GE910 on your Board.......................................................................................................................57
12.1. General...................................................................................................................................................................57
12.2. Module finishing & dimensions.............................................................................................................................57
12.3. Recommended foot print for the application..........................................................................................................58
12.4. Stencil.....................................................................................................................................................................59
12.5. PCB pad design......................................................................................................................................................59
12.6. Recommendations for PCB pad dimensions (mm): ...............................................................................................59
12.7. Solder paste............................................................................................................................................................61
12.7.1. GE910 Solder reflow .....................................................................................................................................61
13. Debug of the GE910 in production..........................................................................................................................63
14. Packing system..........................................................................................................................................................64
14.1. Packing on tray.......................................................................................................................................................64
14.2. Moisture sensibility................................................................................................................................................66
15. Conformity Assessment Issues..................................................................................... Error! Bookmark not defined.
16. SAFETY RECOMMANDATIONS.........................................................................................................................67
17. Document History.....................................................................................................................................................73
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1. Introduction
1.1. Scope
The aim of this document is the description of some hardware solutions useful for developing a product with the Telit GE910 module.
1.2. Audience
This document is intended for Telit customers, who are integrators, about to implement their applications using our GE910 modules.
1.3. Contact Information, Support
For general contact, technical support, to report documentation errors and to order manuals, contact Telit’s Technical Support Center (TTSC) at:
TS-EMEA@telit.com TS-NORTHAMERICA@telit.com TS-LATINAMERICA@telit.com TS-APAC@telit.com
Alternatively, use:
http://www.telit.com/en/products/technical-support-center/contact.php
For detailed information about where you can buy the Telit modules or for recommendations on accessories and components visit:
http://www.telit.com
To register for product news and announcements or for product questions contact Telit’s Technical Support Center (TTSC). Our aim is to make this guide as helpful as possible. Keep us informed of your comments and suggestions for improvements. Telit appreciates feedback from the users of our information.
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1.4. Document Organization
This document contains the following chapters:
Chapter 1: “Introduction” provides a scope for this document, target audience, contact and support information, and text conventions.
Chapter 2: “Overview” provides an overview of the document.
Chapter 3: “GE910 Mechanical Dimensions”
Chapter 3: “GE910 Module Connections” deals with the pin out configuration and layout.
Chapter 4: “Hardware Commands” How to operate on the module via hardware.
Chapter 5: “Power supply” Power supply requirements and general design rules.
Chapter 6: “Antenna” The antenna connection and board layout design are the most important parts in the full product design.
Chapter 7: “Logic Level specifications” Specific values adopted in the implementation of logic levels for this module.
Chapter 8: “Serial ports” The serial port on the Telit GE910 is the core of the interface between the module and OEM hardware
Chapter 9: “Audio Section overview” Refers to the audio blocks of the Base Band Chip of the GE910 Telit Modules.
Chapter 10: “General Purpose I/O” How the general purpose I/O pads can be configured.
Chapter 11: “Mounting the GE910 on the application board” Recommendations and specifics on how to mount the module on the user’s board.
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1.5. Text Conventions
Danger – This information MUST be followed or catastrophic equipment failure or bodily injury may occur.
Caution or Warning – Alerts the user to important points about integrating the module, if these points are not followed, the module and end user equipment may fail or malfunction.
Tip or Information – Provides advice and suggestions that may be useful when integrating the module.
All dates are in ISO 8601 format, i.e. YYYY-MM-DD.
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1.6. Related Documents
• Telit's GSM/GPRS Family Software User Guide, 1vv0300784
• Audio settings application note , 80000NT10007a
• Digital Voice Interface Application Note, 80000NT10004a
• GE910 Product description,
• SIM Holder Design Guides, 80000NT10001a
• AT Commands Reference Guide, 80000ST10025a
• Telit EVK2 User Guide, 1vv0300704
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2. Overview
The aim of this document is the description of some hardware solutions useful for developing a product with the Telit GE910 module. In this document all the basic functions of a mobile phone will be taken into account; for each one of them a proper hardware solution will be suggested and eventually the wrong solutions and common errors to be avoided will be evidenced. Obviously this document cannot embrace the whole hardware solutions and products that may be designed. The wrong solutions to be avoided shall be considered as mandatory, while the suggested hardware configurations shall not be considered mandatory, instead the information given shall be used as a guide and a starting point for properly developing your product with the Telit GE910 module. For further hardware details that may not be explained in this document refer to the Telit GE910 Product Description document where all the hardware information is reported.
NOTICE:
(The integration of the GSM/GPRS GE910 cellular module within user application shall be done according to the design rules described in this manual.
The information presented in this document is believed to be accurate and reliable. However, no responsibility is assumed by Telit Communications S.p.A. for its use, nor any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Telit Communications S.p.A. other than for circuitry embodied in Telit products. This document is subject to change without notice.
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3. GE910 module connections
3.1. PIN-OUT
PAD USB HS 2.0 COMMUNICATION PORT
B15 C15
Asynchronous UART - Prog. / Data + HW Flow Control
N15 M15 M14
L14
P15
N14
P14
R14 Asynchronous Auxiliary UART
D15
E15 RX_AUX I
SIM card interface
A6 A7 A5 SIMIO I/O External SIM signal – Data I/O 1.8 / 3V
A4
A3
Analog Voice Interface
B2 B3 B4 B5
Digital Voice Interface (DVI)
B9 B6 B7 B8
DIGITAL IO
C8
Signal I/O Function Type COMMENT
USB_D+ I/O USB differential Data (+)
USB_D- I/O USB differential Data (-)
C103/TXD I Serial data input from DTE CMOS 1.8V C104/RXD O Serial data output to DTE CMOS 1.8V C108/DTR I Input for (DTR) from DTE CMOS 1.8V
C105/RTS I
C106/CTS O
C109/DCD O Output for (DCD) to DTE CMOS 1.8V C107/DSR O Output for (DSR) to DTE CMOS 1.8V
C125/RING O Output for Ring (RI) to DTE CMOS 1.8V
TX_AUX O Auxiliary UART (TX Data to DTE) CMOS 1.8V
SIMCLK O External SIM signal – Clock 1.8 / 3V SIMRST O External SIM signal – Reset 1.8 / 3V
SIMIN I
SIMVCC -
EAR+ AO Ear signal output, phase +
EAR- AO Ear signal output, phase -
MIC+ AI Microphone signal input; phase +
MIC- AI Microphone signal input; phase -
DVI_WA0 I/O Digital Audio Interface (WA0) CMOS 1.8V
DVI_RX I/O Digital Audio Interface (RX) CMOS 1.8V DVI_TX I/O Digital Audio Interface (TX) CMOS 1.8V
DVI_CLK I/O Digital Audio Interface (CLK) CMOS 1.8V
GPIO_01 I/O GPIO_01 /STAT LED CMOS 1.8V Alternate Function STAT LED
Input for Request to send signal
(RTS) from DTE
Output for Clear to Send signal
(CTS) to DTE
Auxiliary UART (RX Data from
External SIM signal – Presence
(active low)
External SIM signal – Power supply
for the SIM
DTE)
CMOS 1.8V
CMOS 1.8V
CMOS 1.8V
CMOS 1.8
1.8 / 3V
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C9 C10 GPIO_03 I/O GPIO_03 CMOS 1.8V C11
B14 C12 C13 K15 L15
G15
ADC
B1
RF SECTION
K1
MISCELLANEOUS FUNCTIONS
R13
GPIO_02 I/O GPIO_02 CMOS 1.8V
GPIO_04 I/O GPIO_04 CMOS 1.8V GPIO_05 I/O GPIO_05 CMOS 1.8V GPIO_06 I/O GPIO_06 CMOS 1.8V GPIO_07 I/O GPIO_07 CMOS 1.8V GPIO_08 I/O GPIO_08 CMOS 1.8V GPIO_09 I/O GPIO_09 CMOS 1.8V
GPIO_10 I/O GPIO_10 CMOS 1.8V
ADC_IN1 AI Analog to Digital converter input A/D Values 0 to 1.3V
ANTENNA I/O
HW_SHUTDOWN* I HW Unconditional Shutdown CMOS 1.8V Active low
GSM/GPRS Antenna
(50 ohm)
RF
R12
C14
R11
POWER SUPPLY
M1 M2
N1
N2
P1
P2
E1
G1 H1
J1
L1
A2
E2
F2
G2 H2
J2
K2
L2
ON_OFF* I Input command for power ON CMOS 1.8V Active low
VRTC I VRTC Backup capacitor RTC Power
VAUX/PWRMON O
VBATT - Main power supply (Baseband) Power
VBATT - Main power supply (Baseband) Power VBATT_PA - Main power supply (Radio PA) Power VBATT_PA - Main power supply (Radio PA) Power VBATT_PA - Main power supply (Radio PA) Power VBATT_PA - Main power supply (Radio PA) Power
GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power
Supply Output for external
accessories / Power ON Monitor
1.8V
Backup for the embedded RTC
supply, don’t connect to VBATT!
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R2
M3 GND - Ground Power
N3 P3 R3
M4
N4 P4 R4 N5 GND - Ground Power P5 R5 N6 P6 R6 P8 R8
P9 GND - Ground Power P10 R10
M12
B13 P13 E14
RESERVED
C1 RESERVED - RESERVED
D1
C2
D2
C3
D3
E3
F3
G3 H3
J3
K3
L3
C4
C5 RESERVED - RESERVED
C6
C7
GND - Ground Power
GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power
GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power
GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power
RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED
RESERVED - RESERVED RESERVED - RESERVED
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N7
P7
N8
N9 A10 N10 N11 B12 D12 N12 RESERVED - RESERVED P12 F14 G14 H14
J14 K14 N13 L13 RESERVED - RESERVED
J13
M13
K13 H13 G13 F13 A11 A12 RESERVED - RESERVED B11 B10
A9
A8 A13 A14 D13 D14 RESERVED - RESERVED H15
J15
F1
R9
R7
D4 E13
RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED
RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED
RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED
RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED
RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED RESERVED - RESERVED
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F15 P11
RESERVED - RESERVED RESERVED - RESERVED
WARNING:
Reserved pins must not be connected.
NOTE:
If not used, almost all pins should be left disconnected. The only exceptions are the following pins:
PAD signal
M1,M2,N1,N2,P1,P2 VBATT & VBATT_PA
E1,G1,H1,J1,L1,A2,E2,F2,G2,H2,
J2,K2,L2,R2,M3,N3,P3,R3,M4, N4,P4,R4,N5,P5,R5,N6,P6,R6,P8, R8,P9,P10,R10,M12,B13,P13,E14
R12 ON/OFF* R13 HW_SHUTDOWN* B15 USB_D+ C15 USB_D­N15 C103/TXD
M15 C104/RXD
L14 C105/RTS P15 C106/CTS D15 TXD_AUX E15 RXD_AUX
GND
NOTE:
RTS pin should be connected to the GND (on the module side) if flow control is not used. The above pins are also necessary to debug the application when the module is assembled on it.
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3.2. LGA PADs Layout
A B C D E F G H J K L M N P R
1 RES RES RES GND RES GND GND GND ANT GND VBATT
2 GND EAR+ RES RES GND GND GND GND GND GND GND VBATT
SIMVC
3
4 SIMIN MIC+ RES RES GND GND GND GND
5 SIMIO MIC- RES GND GND GND
EAR- RES RES RES RES RES RES RES RES RES GND GND GND GND
C
TOP VIEW
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VBATT_
PA
VBATT_
PA
VBATT_
VBATT_
PA
GND
PA
SIMCL
6
7 SIMRST DVI_TX RES RES RES RES
8 RES
9 RES
10 RES RES GPIO_03 RES GND GND
11 RES RES GPIO_04 RES RES
12 RES RES GPIO_06 RES GND RES RES
13 RES GND GPIO_07 RES
14 RES GPIO_05 VRTC RES GND RES RES RES RES RES
15 USB_D+ USB_D- TX AUX RX AUX RES GPIO_10 RES RES GPIO_08 GPIO_09
DVI_RX RES GND GND GND
K
DVI_CL
GPIO_01 RES GND GND
K
DVI_WA
GPIO_02 RES GND RES
0
VIO1_1V8
RES RES RES RES RES RES RES RES GND
C105/RTS C108/DTR C109/DCD C107/DSR C125/RIN
C104/RXD C103/TXD C106/CT
VAUX/P WRMON
ON_OFF*
HW_SHU TDOWN*
G
S
NOTE:
The pin defined as H4 has to be considered RESERVED and not connected on any pin in the application. The related area on the application has to be kept empty.
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4. Hardware Commands
4.1. Turning ON the GE910
To turn on the GE910 the pad ON-OFF* must be tied low for at least 5 seconds and then released.
The maximum current that can be drained from the ON-OFF* pad is 0,2 mA. A simple circuit to do it is:
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NOTE:
Don't use any pull up resistor on the ON* line, it is internally pulled up. Using pull up resistor may bring to latch up problems on the GE910 power regulator and improper power on/off of the module. The line ON* must be connected only in open collector configuration.
NOTE:
In this document all the lines that are inverted, hence have active low signals are labelled with a name that ends with”*" or with a bar over the name.
TIP:
To check if the device has powered on, the hardware line PWRMON should be monitored. The device is powered on when PWRMON goes high.
NOTE:
It is mandatory to avoid sending data to the serial ports during the first 200mS of the module start-up.
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HW
unconditional
AT init sequence
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The flow chart showing the proper turn on procedure is displayed below:
Modem ON Proc.
Y
PWMON = ON?
N
ON_OFF = LOW
DELAY= 300mSec
Enter AT<CR>
Delay = 5 Sec
ON_OFF = HIGH
PWMON = ON?
Y
Delay 1s
AT answer in 1Sec ?
N
N
SHUTDOWN
Start AT CMD.
Y
NOTE:
In order to avoid a back powering effect it is recommended to avoid having any HIGH logic level signal applied to the digital pins of the GE910 when the module is powered off or during an ON/OFF transition.
.
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AT init sequence
HW
unconditional
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10 Hardware User Guide
GE9GE9
10 Hardware User Guide10 Hardware User Guide
1vv0300962 Rev.4 2012-06-25
The Flow chart showing the AT commands managing procedure is displayed below:
Start AT CMD.
DELAY= 300mSec
Enter AT<CR>
Y
AT answer in
1Sec ?
.
N
SHUTDOWN
Modem ON Proc.
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Mod. 0805 2011-07 Rev.2
GE910 Hardware User Guide
10 Hardware User Guide
GE9GE9
10 Hardware User Guide10 Hardware User Guide
1vv0300962 Rev.4 2012-06-25
For example:
1- Let's assume you need to drive the ON* pad with a totem pole output of a +3/5 V microcontroller:
2- Let's assume you need to drive the ON* pad directly with an ON/OFF button:
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Mod. 0805 2011-07 Rev.2
4.2. Turning OFF the GE910
Turning off of the device can be done in two ways:
• via AT command (see GE910 Software User Guide, AT#SHDN)
• by tying low pin ON*
Either ways, the device issues a detach request to network informing that the device will not be reachable any more.
To turn OFF the GE910 the pad ON* must be tied low for at least 2 seconds and then released. A Pulse duration less than 2 seconds should also start the power off procedure, but this is not guaranteed. The same circuitry and timing for the power on must be used. The device shuts down after the release of the ON* pad.
GE910 Hardware User Guide
10 Hardware User Guide
GE9GE9
10 Hardware User Guide10 Hardware User Guide
1vv0300962 Rev.4 2012-06-25
TIP: To check if the device has been powered off, the hardware line PWRMON must be monitored.
The device is powered off when PWRMON goes low.
NOTE:
In order to avoid a back powering effect it is recommended to avoid having any HIGH logic level signal applied to the digital pins of the GE910 when the module is powered off or during an ON/OFF transition.
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 21 of 73
Mod. 0805 2011-07 Rev.2
HW
unconditional
GE910 Hardware User Guide
10 Hardware User Guide
GE9GE9
10 Hardware User Guide10 Hardware User Guide
1vv0300962 Rev.4 2012-06-25
The following flow chart shows the proper turnoff procedure:
Modem OFF Proc.
N
PWMON = ON?
Y
ON_OFF = LOW
Delay = 2 Sec
ON_OFF = HIGH
PWMON = ON?
Y
Delay 15s
PWMON = ON?
N
N
Y
Modem ON Proc.
SHUTDOWN
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Mod. 0805 2011-07 Rev.2
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